On Wed, 2016-03-30 at 13:05 +0200, Rafael J. Wysocki wrote: > On Wed, Mar 30, 2016 at 12:17 PM, Jörg Otte <jrg.o...@gmail.com> > wrote: > > > > 2016-03-29 23:34 GMT+02:00 Rafael J. Wysocki <r...@rjwysocki.net>: > > > > > > On Tuesday, March 29, 2016 07:32:27 PM Jörg Otte wrote: > > > > > > > > 2016-03-29 19:24 GMT+02:00 Jörg Otte <jrg.o...@gmail.com>: > > > > > > > > > > in v4.5 and earlier intel-pstate downscaled idle processors > > > > > (load > > > > > 0.1-0.2%) to minumum frequency, in my case 800MHz. > > > > > > > > > > Now in v4.6-rc1 the characteristic has dramatically changed. > > > > > If in > > > > > idle the processor frequency is more or less a few MHz around > > > > > 2500Mhz. > > > > > This is the maximum non turbo frequency. > > > > > > > > > > No difference between powersafe or performance governor. > > > > > > > > > > I currently use acpi_cpufreq which works as usual. > > > > > > > > > > Processor: > > > > > Intel(R) Core(TM) i5-4200M CPU @ 2.50GHz (family: 0x6, model: > > > > > 0x3c, > > > > > stepping: 0x3) > > > > > > > > > > Last known good kernel is: 4.5.0-01127-g9256d5a > > > > > First known bad kernel is: 4.5.0-02535-g09fd671 > > > > > > > > > > There is > > > > > commit 277edba Merge tag 'pm+acpi-4.6-rc1-1' of > > > > > git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm > > > > > in between, which brought a few changes in intel_pstate. > > > Can you please check commit a4675fbc4a7a (cpufreq: intel_pstate: > > > Replace timers > > > with utilization update callbacks)? > > > > > Yes , this solved the problem for me. > > I had to resolve some conflicts myself when reverting that > > commit. Hard work :). > Thanks for doing this. Can you please post the revert patch you have > used? > > > > > Here is a 10-seconds trace of the used frequencies when > > in "desktop-idle": > > > > driver cpu0 cpu1 cpu2 cpu3 > > ------------------------------------- > > intel_pstate ( 800 928 941 1200) MHz load:( 0.2)% > > intel_pstate ( 800 928 1181 1800) MHz load:( 0.0)% > > intel_pstate ( 1675 1576 1347 800) MHz load:( 0.0)% > > intel_pstate ( 1198 1576 842 800) MHz load:( 0.5)% > > intel_pstate ( 800 1181 1113 1600) MHz load:( 0.0)% > > intel_pstate ( 808 1181 805 800) MHz load:( 0.5)% > > intel_pstate ( 844 1191 900 1082) MHz load:( 0.3)% > > intel_pstate ( 816 1191 800 800) MHz load:( 0.0)% > > intel_pstate ( 800 905 892 1082) MHz load:( 0.2)% > > intel_pstate ( 945 905 1340 800) MHz load:( 0.3)% > Please also run turbostat with and without your revert patch applied. I want to reproduce this if I can. Can you give us info about your setup (Linux distribution, laptop model etc.)?
Thanks, Srinivas > > Thanks, > Rafael > -- > To unsubscribe from this list: send the line "unsubscribe linux-pm" > in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
